Padlock



April 26, 1932. A VAN KLEECK PADLOCK Filed Dec. 8, 1928 i 1/ Qwuvmtov Patented Apr. 26, 1932 UNITED STATES PATENT OFFICE AUGUSTUS VAN KLEECK, OF MARION, OHIO, ASSIGNOR TO THE WILSOhT-BOHANNAN COMPANY, OF MARION, OHIO, A CORPORATION OF OHIO PADLOCK Application filed December This invention relates to looks, and particularly to a padlock, and has for an ob ect to provide a self locking padlock in WhlCh both the shackle heel and toe is locked in such a manner that the bolts cannot be jarred from their positions.

It is another object of the invention to provide a lock of this type which may be unlocked by turning the key either in a clockwise or counterclockwise direction.

It is also an object of the invention to provide a construction in which the lock may be openedregardless of spring failure.

It is a further object to provide a construction which will facilitate ease in manufacture and assembling, and in which the working parts may be made from sheet metal 1nstead of castings.

With the foregoing and other objects in view, the invention consists in certain novel features of construction, combinations and arrangements of parts as will be more fully disclosed in connection with the accompanying drawings. In these drawings,

Fig. 1 is a side view of the lockwlth the front plate or section of the casing removed and showingthe elements in the locked position.

Fig. 2 is a similar view showing the first movements of the tumbler and rear bolt in the unlocking operation.

Fig. 3 is a similar view showing the elements in the unlocked position.

Fig. 4 is a section substantially on line l4:, of Fig. 1.

Figs. 5and 6 are a side and edge elevation respectively of the front bolt.

Figs. 7 and 8 are a side and top plan view respectively of the tumbler.

Figs. 9 and 10 are a side and top plan view respectively of the rear bolt.

Fig. 11 is a side elevation of a key, and

Fig. 12 is a detail elevation of a portion of the front plate looking toward the inside thereof.

The look as illustrated comprises a body or casing composed of two sections a rear section 13 and a front section 14 formed from relatively heavy sheet metal and, of course, enclosing the works of the padlock. Piv- 8, 1928. Serial No. 324,636.

oted between the sections of the body or casing on a cross pin 15is a shackle 16 ofsu'bstantially U-shape having a lug or heel 17 at its pivoted endand an opening 18 through its nose or free end 19. This shackle is locked by two bolts, a bolt20 which locks'the toe end of the shackle and is, therefore, for convenience called the front bolt, and a bolt 21 which looks the heel and is, therefore, for conven ience called the rear bolt. The shape of the front bolt 20 is shown more clearly in Figs. 5 and 6 and is pivoted on a cross pin 22. This bolt has two arms 23 and 24, the arm 23 carrying a lug or hook 25 to extend into the opening 18 in the toe of the shackle to lock it, while the arm 24 is shaped to cooperate with the bit of the key as will later be described.

The rear bolt 21 is pivoted on a cross pin 26 and is soarranged that one end 27 may lie in front of the shoulder 28 at the forward side of the heel 17 to lock the heel, as shown in Fig. 1. It also carries a laterally extending fence or lug 29 projecting over the top edge of a movable tumbler 30. This tumbler is pivoted on a cross pin 31 and has in its top edge a gate or slot 32 which under certain conditions is brought into alignment with the lug 29 as will be'described presently. The tumbler has an arm 33 shaped to cooperate with the bit of the key, and includes a curved edge 34 on its under side for a purpose which will appear later. The rear bolt 21 also has a laterally extending lug or car 35 which extends over the upper edge of the arm 24 of the front bolt 20. There is a spring 36 secured to thetumbler 30 which tends to swing it counterclockwise, as seen in Figs. 1, 2 and 3, about its pivot 31. There is also a spring 37 mounted on the stud 26, one arm 38 of which engages under the toe 1 9 of the shackle and tends to force it upwardly about its piv- 0t 15, while the other end 39 of this spring engages underthe fence or lug 29 on the rear bolt 21 and tends to swing this bolt counterclockwise about its pivot 26.

Mounted on the rear section 13 of the casing is a stud 40 to project into the shank of the key 41 to guide-the same and hold it in proper position, and mounted on the pins 22 and 31 and extending between them is a stationary guard 42. This guard has a curved lower edge 43 with shoulders 44 and 45 on opposite sides thereof. These shoulders will engage the bit of an unproper key and prevent its turning, while a key with a proper ward in its bit would move around the curved edge 43. This guard also assists in guiding the proper key and retaining it during its turning movements in proper position for operating the various bolts and tumblers. The bolts 20 and 21, tumbler 30 and guard 42 are all so shaped that they can be readily made from sheet metal by stamping them from a suitable blank, and therefore, are not required to be cast. This gives a stronger more accurate and better construction at less expense.

The action of the lock is as follows: When the parts are in locked position as shown in Fig. 1 the hook or lug of the front bolt 20 is in the opening 18 of the toe of the shackle and the end 27 of the rear bolt is in front of the heel lug 17 so that the shackle is looked at both ends. Also the fence or lug 29 of the rear bolt 21 is above the upper edge of the tumbler 30 so that this bolt is held against movement. Still further the ear or lug on the rear bolt 21 lies over the upper edge 47 of the front bolt 20 to thus retain this bolt in When the key is turned in the clockwise direction a certain portion of the bit will first engage the end 47 of the tumbler 30 and will raise this end of the tumbler until the gate or slot 32 is in alignment with the fence or lug 29 on the rear bolt 21. The rear bolt 21 may now be shifted, and further turning movement of the key will cause its bit to engage the under edge of the rear bolt 21 and turn it clockwise about its pivots 26 moving the lug 29 into the gate or slot 32 in the tumbler,

as shown in Fig. 2, and also removing the end 27 of the rear bolt 21 from engagement with the heel lug 17. The curve of the edge 34 of the tumbler is such that during this movement it permits the key to remain in engagement or dwell on the tumbler until another part of the bit raises the forward end of the rear bolt. A further movement of the key causes the bit to engage the under edge of the fre arm 24 of the front bolt 20 to swing this bolt in the counterclockwise direction about its ivot 22 and to disengage the lug or hook 25 rom the toe of the shackle. The shackle is now unlocked and will be swung aboutits pivot 15 by the action of the spring arm 38 against the end of the toe, thus moving the shackle to the open position of Fig. 3.

The rear bolt 21 also has on its upper edge a small shoulder 48 which when the shackle is in this open position is forced by the arm 39 of the spring behind the rear edge of the heel lug 17, as shown in Fig. 3, to yieldingly retain the shackle in its unlocked position. It will also be seen from Fig. 3 that the shape of the rear bolt 21 is such that when the heel 17 of the shackle is resting against it while the shackle is in the unlocked position, the fence or lug 29 on this rear bolt is engaged in the slot or gate 32 in the tumbler, thus retaining the tumbler in the position of Fig. 3. It is, of course, obvious that several tumblers could be used instead of one to thus increase the number of combinations, and also the shapes of the bolts could be varied without altering the principles of the invention.

In locking this padlock, forcing downwardly on the shackle will cause the rear bolt 21 to yield sufficiently to permit the heel lug 17 to move from the short shoulder 48, and the free end or toe of the shackle may be forced into the casing against the action of the arm 38 of the spring to bring the opening 18 in this toe in alignment with the lug or hook 25 on the front bolt 20. In this position the frontedge or shoulder 28 of the heel lug 17 is moved back of the end 27 of the rear bolt 21 and the. arm 39 of the spring now swings this rear bolt 21 counterclockwise about its pivot carrying the end 27 of this bolt in front of the lug 17 to the locking p0 sition. At the same time the lug or ear 35 on this rear bolt acting on the top edge 47 of the front bolt 20 swings this bolt clockwise about its pivot to carry the lug or hook 25 into the opening 18 in the toe of the shackle, thus locking the free end of the shackle. As the rear bolt 21 is swung to this position the fence or lug 29 moves from the slot 32 in the tumbler 30 thus relasing it and permitting the spring 36 to swing this tumbler counterclockwise to the position of Fig. 1 with its upper edge under the lug 29 to thus retain both the rear bolt and the front bolt in the locking position. This movement of the tumbler is limited by the stop lug 55 on the tumbler engaging the lug 29 on the rear bolt.

If the key after being inserted in the lock is turned to the left or counterclockwise the bit will engage the shoulder 49 on the tumbler 30 and swing it on its pivot 31 to the position of Fig. 2 to bring its slot 32 in alignment with the lug 29 on the rear bolt 21. Further move ment of the key will retain this tumbler in this position and will engage the lower edge of the bolt 21 to swing it to the position of Fig. 2 to release the heel lug 17. The bit of the key will also engage the end 50 of the front bolt 20 and swing it about its pivot to re lease it from engagement with the toe of the shackle. Thus the key will unlock this look when rotated counterclockwise as well as clockwise. The inward movement of the hook or lug 25 of the front bolt is limited by the extension 51 engaging the flange of the 'casing to prevent this lever turning too far when the shackle is unlocked.

Secured to the inner wall of the front section 14 of the casing is a filling piece 52. This is made of sheet metal and may be either riveted to the casing by rivets or by integral lugs 53 projecting from the base of the filling piece and extending into openings in the wall of the casing. This element has a drawn section 5 f about the key hole to increase the bearing for the key and facilitate its proper insertion in the lock, and also fills the space between the front wall of the casing and the back of the bit of the key to help retain the key in proper position while in the lock.

It will be apparent from the foregoing description that the lock is of simple and effective construction, that it may be made almost entirely of sheet metal and that the bolts cannot be jarred out of position. Also that the lock may be opened regardless of spring failure. The fact that the parts may be made of sheet metal greatly increases the ease in manufacture and reduces the cost as they may be made more accurately at less cost. This further gives a better operating construction.

Having thus set forth the nature of my invention, what I claim is:

1. In a padlock, a casing, a shackle pivoted in the casing having shoulders at its toe and heel, a pair of pivoted bolts adapted to engage said shoulders respectively and shaped to be operated by positive actuationfrom the key to release said shoulders by operation of the key in either a clockwise or counterclockwise direction, and a tumbler, said tumbler adapted to engage one of the bolts to lock it in engagement with one of said shoulders, said bolt adapted to engage and hold the other bolt in engagement with its shoulder, and said tumbler adapted to be shifted by said key.

2. In a padlock, a casing including a front section having a key hole, key operated mechanism in the casing, a filling piece of sheet metal secured to the inner wall of said section, said filling piece being of a size to completely surround the key hole and provided with a similarly shaped hole in alignment therewith, said filling piece also having a drawn portion around the key hole to guide the key and fill the space between the section and the bit of the key.

3. In a padlock, a casing, a shackle pivoted in the casing and having shoulders at its toe and heel, front and rear pivoted bolts adapted to engage said shoulders respectively to lock the shackle, said bolts having oppositely projecting overlapping arms and pivoted to turn in opposite directions to the locking position, said bolts having their overlapping arms arranged for operation in opposite directions by a key, a lug carried by one overlapping arm and engaging over the other to hold the latter bolt in locked position, and a key operated tumbler to hold the bolt carrying said lug in locked position.

4. In a padlock, a casing, a shackle pivoted in the casing, front and rear bolts in the casing adapted to engage and lock the shackle, a means pivotally mounting each ofsaid bolts, a key operated pivoted tumbler to hold the rear bolt in locked position, means pivoting the tumbler, means on the rear bolt to engage the front bolt and hold it in locked position, and a curved key guide supported by the tumbler and bolt pivoting means.

5. In a padlock, a casing, a shackle pivoted in the casing, front and rear bolts in the casing adapted to engage and lock the shackle, a means pivotally mounting each of saidbolts, a key operated pivoted tumbler to hold the rear bolt in locked position, means pivoting the tumbler, means on the rear bolt to engage the front bolt and hold it in locked position, a curved key guide supported by the tumbler and bolt pivoting means, and shoulders on said key guide, said shoulders guarding against the use of an improper key.

In testimony whereof I affix my signature.

AUGUSTUS VAN KLEECK. 

